Everything is the same in the white QS8s and we do manage to get both 5 1/4" woofers into that cabinet. The impedance rating on the QS8s was at 8 ohms on the rear labels until we recently changed them to 6 ohms. The QS8 impedance curve reaches its minimum impedance fairly high up in frequency so the amplifier is going to operate like it was an 8 ohm speaker, but it is 6 ohms from the technical interpretation of the impedance curve.